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Title: A Continuum Dislocation Dynamics Crystal Plasticity Approach to Irradiated Body-Centered Cubic α-Iron

Journal Article · · Journal of Engineering Materials and Technology
DOI: https://doi.org/10.1115/1.4052256 · OSTI ID:1838414
ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [4]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Politecnico di Milano (Italy)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Washington State Univ., Pullman, WA (United States)

Radiation-induced embrittlement of reactor pressure vessel (RPV) steels can potentially limit the operating life of nuclear power plants. Over extended exposure to radiation doses, these body-centered cubic (BCC) irons demonstrate irradiation damage. Here, we present a continuum dislocation density (CDD) crystal plasticity model to capture the interaction among dislocations and self-interstitial atom (SIA) loops in α-iron. We demonstrate the importance of modeling cross slip using a combined stochastic Monte Carlo approach and the role of slip system strength anisotropy in capturing stochastic cross slip interactions. Through these captured interactions, the CDD crystal plasticity model can capture both the stress response and the physical evolution of dislocations on different slip system planes. Single-crystal verification experiments are used to calibrate the CDD crystal plasticity model, and a set of simplified polycrystalline simulations demonstrates the model’s ability to capture the stress response from tensile experiments on α-iron.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-76RL01830; AC07-05ID14517; NE0008827; AC02-06CH11357
OSTI ID:
1838414
Report Number(s):
PNNL-SA--159287; INL/JOU--21-61409-Rev000
Journal Information:
Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 1 Vol. 144; ISSN 0094-4289; ISSN 1528-8889
Publisher:
ASMECopyright Statement
Country of Publication:
United States
Language:
English

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